128438970

Names of 128438970

• Cardinal: 128438970 can be written as One hundred twenty-eight million, four hundred thirty-eight thousand, nine hundred seventy.

Scientific notation

• Scientific notation: 1.2843897 × 10⁸

Factors of 128438970

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 13471

Divisors of 128438970

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 11 15 22 29 30 33 55 58 66 87 110 145 165 174 290 319 330 435 638 870 957 1595 1914 3190 4785 9570 13421 26842 40263 67105 80526 134210 147631 201315 295262 389209 402630 442893 738155 778418 885786 1167627 1476310 1946045 2214465 2335254 3892090 4281299 4428930 5838135 8562598 11676270 12843897 21406495 25687794 42812990 64219485 128438970
• Sum of all divisors σ(n): 347898240
• Sum of proper divisors (its aliquot sum) s(n): 219459270
• 128438970 is an abundant number, because the sum of its proper divisors (219459270) is greater than itself. Its abundance is 91020300

Bases of 128438970

• Binary: 111101001111101001010111010₂
• Hexadecimal: 0x7A7D2BA
• Base-36: 24GW56

Squares and roots of 128438970

• 128438970 squared (128438970²) is 16496569014660900
• 128438970 cubed (128438970³) is 2118802332776960895273000
• The square root of 128438970 is 11333.0918111519
• The cube root of 128438970 is 504.5438746507

Scales and comparisons

• 128,438,970 seconds is equal to 4 years, 4 weeks, 2 days, 13 hours, 29 minutes, 30 seconds.
• To count from 1 to 128,438,970 would take you about six years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 128438970 cubic inches would be around 42 feet tall.

Recreational maths with 128438970

• 128438970 backwards is 079834821
• The number of decimal digits it has is: 9
• The sum of 128438970's digits is 42
• More coming soon!